Shamusworld >> Repos - virtualjaguar/blob - src/video.cpp

   1 //
   2 // VIDEO.CPP: SDL/local hardware specific video routines
   3 //
   4 // by James L. Hammons
   5 //
   6
   7 #include "video.h"
   8
   9 #include "tom.h"
  10 #include "sdlemu_opengl.h"
  11 #include "settings.h"
  12 #include "log.h"
  13
  14 // External global variables
  15
  16 //shouldn't these exist here??? Prolly.
  17 //And now, they do! :-)
  18 SDL_Surface * surface, * mainSurface;
  19 SDL_Joystick * joystick;
  20 Uint32 mainSurfaceFlags;
  21 //int16 * backbuffer;
  22 uint32 * backbuffer;
  23
  24 // One of the reasons why OpenGL is slower then normal SDL rendering, is because
  25 // the data is being pumped into the buffer every frame with a overflow as result.
  26 // So, we going tot render every 1 frame instead of every 0 frame.
  27
  28 // [Shamus] This isn't the case. OpenGL is slower because 60 frames a second is a
  29 //          lot of data to pump through the system. In any case, frameskip is probably
  30 //          a good idea for now, since most systems are probably too slow to run at
  31 //          60 FPS. But doing so will have some nasty side effects in some games.
  32 //          You have been warned!
  33
  34 int frame_ticker = vjs.frameSkip;
  35
  36 //
  37 // Create SDL/OpenGL surfaces
  38 //
  39 bool InitVideo(void)
  40 {
  41         // Get proper info about the platform we're running on...
  42         const SDL_VideoInfo * info = SDL_GetVideoInfo();
  43
  44         if (!info)
  45         {
  46                 WriteLog("VJ: SDL is unable to get the video info: %s\n", SDL_GetError());
  47                 return false;
  48         }
  49
  50         if (vjs.useOpenGL)
  51         {
  52             // Initializing SDL attributes with OpenGL
  53             SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
  54         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
  55                 mainSurfaceFlags = SDL_OPENGL;
  56
  57         }
  58         else
  59         {
  60                 if (info->hw_available)
  61                         mainSurfaceFlags = SDL_HWSURFACE | SDL_HWPALETTE | SDL_DOUBLEBUF;
  62
  63                 if (info->blit_hw)
  64                         mainSurfaceFlags |= SDL_HWACCEL;
  65         }
  66
  67         if (vjs.fullscreen)
  68                 mainSurfaceFlags |= SDL_FULLSCREEN;
  69
  70 /*      if (!vjs.useOpenGL)
  71 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT_NTSC, 16, mainSurfaceFlags);
  72                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH,
  73                         (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
  74                         16, mainSurfaceFlags);
  75         else
  76                 // When OpenGL is used, we're going to use a standard resolution of 640x480.
  77                 // This way we have good scaling functionality and when the screen is resized
  78                 // because of the NTSC <-> PAL resize, we only have to re-create the texture
  79                 // instead of initializing the entire OpenGL texture en screens.
  80                 mainSurface = SDL_SetVideoMode(640, 480, 16, mainSurfaceFlags);//*/
  81 //24BPP
  82         if (!vjs.useOpenGL)
  83 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT_NTSC, 16, mainSurfaceFlags);
  84                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH,
  85                         (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
  86                         32, mainSurfaceFlags);
  87         else
  88                 // When OpenGL is used, we're going to use a standard resolution of 640x480.
  89                 // This way we have good scaling functionality and when the screen is resized
  90                 // because of the NTSC <-> PAL resize, we only have to re-create the texture
  91                 // instead of initializing the entire OpenGL texture en screens.
  92                 mainSurface = SDL_SetVideoMode(640, 480, 32, mainSurfaceFlags);//*/
  93
  94         if (mainSurface == NULL)
  95         {
  96                 WriteLog("VJ: SDL is unable to set the video mode: %s\n", SDL_GetError());
  97                 return false;
  98         }
  99
 100         SDL_WM_SetCaption("Virtual Jaguar", "Virtual Jaguar");
 101
 102         // Create the primary SDL display (16 BPP, 5/5/5 RGB format)
 103 /*      surface = SDL_CreateRGBSurface(SDL_SWSURFACE, VIRTUAL_SCREEN_WIDTH,
 104                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
 105                 16, 0x7C00, 0x03E0, 0x001F, 0);//*/
 106
 107         uint32 vsWidth = VIRTUAL_SCREEN_WIDTH;
 108
 109         if (vjs.renderType == RT_TV)
 110                 vsWidth = 1280;
 111 //24BPP
 112 //      surface = SDL_CreateRGBSurface(SDL_SWSURFACE, VIRTUAL_SCREEN_WIDTH,
 113         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, vsWidth,
 114                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL), 32,
 115 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 116                  0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
 117 #else
 118                  0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
 119 #endif//*/
 120
 121         if (surface == NULL)
 122         {
 123                 WriteLog("VJ: Could not create primary SDL surface: %s\n", SDL_GetError());
 124                 return false;
 125         }
 126
 127         if (vjs.useOpenGL)
 128                 // Let us setup OpenGL and our rendering texture. We give the src (surface) and the
 129                 // dst (mainSurface) display as well as the automatic bpp selection as options so that
 130                 // our texture is automaticly created :)
 131                 sdlemu_init_opengl(surface, mainSurface, 1 /*method*/,
 132                         vjs.glFilter /*texture type (linear, nearest)*/,
 133                         0 /* Automatic bpp selection based upon src */);
 134
 135         // Initialize Joystick support under SDL
 136
 137         if (vjs.useJoystick)
 138         {
 139                 if (SDL_NumJoysticks() <= 0)
 140                 {
 141                         vjs.useJoystick = false;
 142                         printf("VJ: No joystick(s) or joypad(s) detected on your system. Using keyboard...\n");
 143                 }
 144                 else
 145                 {
 146                         if ((joystick = SDL_JoystickOpen(vjs.joyport)) == 0)
 147                         {
 148                                 vjs.useJoystick = false;
 149                                 printf("VJ: Unable to open a Joystick on port: %d\n", (int)vjs.joyport);
 150                         }
 151                         else
 152                                 printf("VJ: Using: %s\n", SDL_JoystickName(vjs.joyport));
 153                 }
 154         }
 155
 156         // Set up the backbuffer
 157 //To be safe, this should be 1280 * 625 * 2...
 158 //      backbuffer = (int16 *)malloc(845 * 525 * sizeof(int16));
 159 /*      backbuffer = (int16 *)malloc(1280 * 625 * sizeof(int16));
 160 //      memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT_NTSC * sizeof(int16));
 161         memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH *
 162                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL)
 163                 * sizeof(int16));//*/
 164 //24BPP
 165         backbuffer = (uint32 *)malloc(1280 * 625 * sizeof(uint32));
 166 //      memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT_NTSC * sizeof(int16));
 167         memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH *
 168                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL)
 169                 * sizeof(uint32));
 170
 171         return true;
 172 }
 173
 174 //
 175 // Free various SDL components
 176 //
 177 void VideoDone(void)
 178 {
 179         if (vjs.useOpenGL)
 180                 sdlemu_close_opengl();
 181
 182         SDL_JoystickClose(joystick);
 183         SDL_FreeSurface(surface);
 184         free(backbuffer);
 185 }
 186
 187 //
 188 // Render the backbuffer to the primary screen surface
 189 //
 190 void RenderBackbuffer(void)
 191 {
 192         if (SDL_MUSTLOCK(surface))
 193                 while (SDL_LockSurface(surface) < 0)
 194                         SDL_Delay(10);
 195
 196 //      memcpy(surface->pixels, backbuffer, tom_getVideoModeWidth() * tom_getVideoModeHeight() * 2);
 197         if (vjs.renderType == RT_NORMAL)
 198                 memcpy(surface->pixels, backbuffer, tom_getVideoModeWidth() * tom_getVideoModeHeight() * 4);
 199         else if (vjs.renderType == RT_TV)
 200                 memcpy(surface->pixels, backbuffer, 1280 * tom_getVideoModeHeight() * 4);
 201
 202         if (SDL_MUSTLOCK(surface))
 203                 SDL_UnlockSurface(surface);
 204
 205         if (vjs.useOpenGL)
 206         {
 207                 // One of the reasons why OpenGL is slower then normal SDL rendering, is because
 208                 // the data is being pumped into the buffer every frame with a overflow as result.
 209                 // So, we going to render every 1 fps instead of every 0 fps.
 210                 // [Shamus] This is isn't why it's slower--see top of file for explanation... ;-)
 211                 if (frame_ticker == 0)
 212                 {
 213                         sdlemu_draw_texture(mainSurface, surface, 1/*1=GL_QUADS*/);
 214                         frame_ticker = vjs.frameSkip;           // Reset frame_ticker
 215                 }
 216                 else
 217                         frame_ticker--;
 218     }
 219         else
 220         {
 221                 SDL_Rect rect = { 0, 0, surface->w, surface->h };
 222                 SDL_BlitSurface(surface, &rect, mainSurface, &rect);
 223                 SDL_Flip(mainSurface);
 224     }
 225 }
 226
 227 //
 228 // Resize the main SDL screen & backbuffer
 229 //
 230 void ResizeScreen(uint32 width, uint32 height)
 231 {
 232         char window_title[256];
 233
 234         SDL_FreeSurface(surface);
 235 //      surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 16, 0x7C00, 0x03E0, 0x001F, 0);
 236 //24BPP
 237         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32,
 238 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 239                  0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
 240 #else
 241                  0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
 242 #endif//*/
 243
 244         if (surface == NULL)
 245         {
 246                 WriteLog("Video: Could not create primary SDL surface: %s", SDL_GetError());
 247 //This is just crappy. We shouldn't exit this way--it leaves all kinds of memory leaks
 248 //as well as screwing up SDL... !!! FIX !!!
 249                 exit(1);
 250         }
 251
 252         if (vjs.useOpenGL)
 253         {
 254                 // Recreate the texture because of the NTSC <-> PAL screen resize.
 255                 sdlemu_create_texture(surface, mainSurface, vjs.glFilter, 0);
 256         }
 257         else
 258         {
 259                 mainSurface = SDL_SetVideoMode(width, height, 32, mainSurfaceFlags);
 260
 261                 if (mainSurface == NULL)
 262                 {
 263                         WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 264                         exit(1);
 265                 }
 266         }
 267
 268         sprintf(window_title, "Virtual Jaguar (%i x %i)", (int)width, (int)height);
 269         SDL_WM_SetCaption(window_title, window_title);
 270 }
 271
 272 //
 273 // Return the screen's width in pixels
 274 //
 275 uint32 GetSDLScreenWidthInPixels(void)
 276 {
 277         return surface->pitch / 4;                                              // Pitch / 4 since we're in 32BPP mode
 278 }
 279
 280 //
 281 // Fullscreen <-> window switching
 282 //
 283 void ToggleFullscreen(void)
 284 {
 285 //NOTE: This does *NOT* work with OpenGL rendering! !!! FIX !!!
 286         if (vjs.useOpenGL)
 287                 return;                                                                         // Until we can fix it...
 288
 289         vjs.fullscreen = !vjs.fullscreen;
 290         mainSurfaceFlags &= ~SDL_FULLSCREEN;
 291
 292         if (vjs.fullscreen)
 293                 mainSurfaceFlags |= SDL_FULLSCREEN;
 294
 295         mainSurface = SDL_SetVideoMode(tom_width, tom_height, 32, mainSurfaceFlags);
 296
 297         if (mainSurface == NULL)
 298         {
 299                 WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 300                 exit(1);
 301         }
 302
 303         SDL_WM_SetCaption("Virtual Jaguar", "Virtual Jaguar");
 304 }